Toyota has announced that it will be recalling over 1 million vehicles globally due to a possible wiring harness fire risk concern.

The wiring harness in question is connected to the vehicle’s hybrid power unit.

“The subject vehicles have an engine wire harness which is connected to the hybrid vehicle Power Control Unit. A portion of the wire harness could contact the cover at this connection and wear over time, causing an electrical short circuit, which can generate heat. If sufficient heat is generated, there is an increased risk of a vehicle fire,” according to Toyota.

Vehicles produced between June 2015 and May 2018 are affected by this issue and Toyota says it will inspect and repair vehicles free of charge.

“For all involved vehicles, Toyota dealers will check the engine wire harness assembly. If a wire core is exposed, the engine wire harness assembly will be replaced with a new one that includes a protective sleeve. If a wire core is not exposed, protective tape will be installed on the engine wire harness assembly.”

Affected models include the Toyota Prius hybrid and plug-in hybrid versions of the Prius and CH-R crossover. Over 1.03 million vehicles have been identified by the global automaker as part of the recall, nearly half of which were sold in its domestic market in Japan.